Method for perforating water well pipe casings

Abstract

A tool for perforating water well pipe casings is disclosed. The tool is designed for use with air rotary water well drilling apparatus. The tool includes a slideable casing perforator wheel actuated by a pneumatic cylinder carried within the tool. The casing may be perforated and subsequent development of the well carried out while the tool is in place. No removal is necessary to carry out well development.

I claim: 
     
       1. The method of perforating and developing a well having a casing comprising the steps of: inserting a tool having a perforator and a source of pressure fluid thereon into the well;   piercing into the lower end of the well casing wall a plurality of separate non-connected perforations;   holding the perforator in engaging position with at least one perforation in the well casing;   and developing the well after perforation by discharging pressurized air from the tool at a position above the perforations while the perforator is in engagement with the well casing, so that sand, mud and debris are forced from the well while the tool remains within the well.